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The Augustan History (Latin: Historia Augusta) is a late Roman collection of biographies, written in Latin, of the Roman Emperors, their junior colleagues, designated heirs and usurpers of the period 117 to 284. Supposedly modeled on the similar work of Suetonius, The Twelve Caesars, it presents itself as a compilation of works by six different authors (collectively known as the Scriptores Historiae Augustae), written during the reigns of Diocletian and Constantine I and addressed to those emperors or other important personages in Rome. The collection, as extant, comprises thirty biographies, most of which contain the life of a single emperor, while some include a group of two or more, grouped together merely because these emperors were either similar or contemporaneous.{{sfn|Magie|1921|p=xii}}The true authorship of the work, its actual date, its reliability, and its purpose, have long been matters for controversy amongst historians and scholars, ever since Hermann Dessau in 1889 rejected both the date and the authorship as stated within the manuscript. Major problems include the nature of the sources it used, and how much of the content is pure fiction. For instance, the collection contains in all about 150 alleged documents, including 68 letters, 60 speeches and proposals to the people or the senate, and 20 senatorial decrees and acclamations. Virtually all of these are now considered to be fraudulent.{{sfn|Magie|1921|pp=xxâxxi}}By the second decade of the 21st century, the overall consensus supported the position that there was only a single author who was writing either at the end of the 4th century or the beginning of the 5th century, and who was interested in blending contemporary issues (political, religious and social) into the lives of the 3rd century emperors. There is further consensus that the author used the fictitious elements in the work to highlight references to other published works, such as to Cicero and Ammianus Marcellinus in a complex allegorical game. Despite these conundrums, it is the only continuous account in Latin for much of its period and is thus continually being re-evaluated, since modern historians are unwilling to abandon it as a unique source of possible information, despite its obvious untrustworthiness on many levels.{{sfn|Breisach|2007|p=75}}

Title and scope

The name Historia Augusta originated with Isaac Casaubon, who produced a critical edition in 1603, working from a complex manuscript tradition with a number of variant versions.{{sfn|Magie|1921|p=xi}} The title as recorded on the Codex Palatinus manuscript (written in the 9th century) is Vitae Diversorum Principum et Tyrannorum a Divo Hadriano usque ad Numerianum Diversis compositae ("The Lives of various Emperors and Tyrants from the Divine Hadrian to Numerian by Various Authors"), and it is assumed that the work may have been originally called de Vita Caesarum or Vitae Caesarum.{{sfn|Magie|1921|p=xi}}How widely the work was circulated in late antiquity is unknown, but its earliest use was in a Roman History composed by Quintus Aurelius Memmius Symmachus in 485.{{sfn|Birley|1988|p=20}} Lengthy citations from it are found in authors of the 6th and 9th centuries, including Sedulius Scottus who quoted parts of the Marcus Aurelius, the Maximini and the Aurelian within his Liber de Rectoribus Christianis, and the chief manuscripts also date from the 9th or 10th centuries.{{sfn|Magie|1921|pp=xxivâxxv}} The six Scriptores â "Aelius Spartianus", "Julius Capitolinus", "Vulcacius Gallicanus", "Aelius Lampridius", "Trebellius Pollio", and "Flavius Vopiscus (of Syracuse)" â dedicate their biographies to Diocletian, Constantine and various private persons, and so ostensibly were all writing around the late 3rd and early 4th century. The first four scriptores are attached to the lives from Hadrian to Gordian III, while the final two are attached to the lives from Valerian to Numerian.The biographies cover the emperors from Hadrian to Carinus and Numerian. A section covering the reigns of Philip the Arab, Decius, Trebonianus Gallus, Aemilian and all but the end of the reign of Valerian is missing in all the manuscripts,{{sfn|Birley|1988|p=9}} and it has been argued that biographies of Nerva and Trajan have also been lost{{sfn|Birley|1988|p=9}} at the beginning of the work, which may suggest the compilation might have been a direct continuation of Suetonius' The Twelve Caesars. It has been theorized that the mid-3rd-century lacuna might actually be a deliberate literary device of the author or authors, saving the labour of covering Emperors for whom little source material may have been available.{{sfn|Birley|1967|pp=125â130}}Despite devoting whole books to ephemeral or in some cases non-existent usurpers,{{sfn|Syme|1983|pp=118â119}}{{sfn|Syme|1971|p=277}} there are no independent biographies of the Emperors Quintillus and Florian, whose reigns are merely briefly noted towards the end of the biographies of their respective predecessors, Claudius Gothicus and Tacitus. For nearly 300 years after Casaubon's edition, though much of the Augustan History was treated with some scepticism, it was used by historians as an authentic source â Edward Gibbon used it extensively in the first volume of the Decline and Fall of the Roman Empire.{{sfn|Barnes|1978|p=12}} However, "in modern times most scholars read the work as a piece of deliberate mystification written much later than its purported date, however the fundamentalist view still has distinguished support. (...) The Historia Augusta is also, unfortunately, the principal Latin source for a century of Roman history. The historian must make use of it, but only with extreme circumspection and caution."{{sfn|Browning|1983|pp=43,45}}

Textual transmission

Existing manuscripts and witnesses of the Augustan History fall into three groups:

A manuscript of the first quarter of the ninth century, Vatican Pal. lat. 899 (Codex Palatinus), known as P, and its direct and indirect copies. P was written at Lorsch in Caroline minuscule. The text in this manuscript has several lacunae marked with dots indicating the missing letters, a confusion in the order of the biographies between Verus and Alexander, and the transposition of several passages: two long ones which correspond to a quire of the original which became loose and was then inserted in a wrong place, and a similar transposition in Carus.{{sfn|Magie|1921|p=xxxiii}} P is also distinguished by a succession of six centuries of editorial corrections, beginning with the original scribe, and includes such worthies as Petrarch and Poggio Bracciolini; none of these editors betray any knowledge of any other witness.{{sfn|Marshall|1983|p=354f}}

A group of 15th-century manuscripts, designated as Î£. Not only are the lives rearranged in chronological order, but the corruptions present in P have been subjected to drastic emendations or omitted altogether. Beginning with Dr. Ernst Hohl, some have asserted that the improvements in the text come from a source independent of P. Although admitting that "this question still remains to be answered definitively", author Peter Marshall noted that research undertaken through to the 1980s had improved scholarly knowledge concerning the methods and abilities of early Italian humanists, and concludes by saying that "the Î£ manuscripts nowhere provide readings which are beyond the powers of the humanists active at the time.{{sfn|Marshall|1983|p=355}}

Three different sets of excerpts, one of which Theodor Mommsen suggested was possibly the work of Sedulius Scottus. How any are related to P is unclear.{{sfn|Marshall|1983|p=356}}

In Marshall's opinion, the best scholarly editions are those by H. Peter (Teubner, 2nd ed. 1884), & E. Hohl (Teubner, 1971, reissue of 1965 revised by Ch. Samberger & W. Seyfarth).{{sfn|Marshall|1983|p=354f}}A later version of the Codex Palatinus (possibly a version that was made for Petrarch in 1356) was the basis of the editio princeps of the History, published in Milan in 1475. A subsequent printed version (the Aldine edition) was published at Venice in 1516, and this was followed closely by an edition edited by Desiderius Erasmus, and published by Johann Froben in Basel in 1518.{{sfn|Magie|1921|p=xxviii}}

Six scriptores or a single author?

Linked to the problem of dating the composition of the History is the question about the authorship of the work. Taking the History at face value, there is clearly a division between the authors named prior and after the presence of the interrupting lacuna. For the first half of the History, four scriptores are present, and the biographies are divided in a remarkably erratic fashion:{{sfn|Birley|1988|p=12}}

Of these four, Spartianus and Gallicanus claim to be undertaking a complete set of imperial biographies from Julius Caesar onwards, while Lampridius' stated intention was to write a collection of biographies that would deal with the Gordians, Claudius II, Aurelian, Diocletian, Maximian and the four rivals of Constantine. Capitolinus also implied that he was writing more biographies than are present in the History.{{sfn|Birley|1988|pp=11â12}}The second half of the History is divided between two scriptores. Unlike the first half, the emperors tackled in this section are grouped logically, and are divided roughly in half between the two scriptores in chronological sequence:

In terms of any acknowledgement of the mutual existence between the scriptores, only Flavius Vopiscus (ostensibly writing in 305 or 306)In the Aurelian, Vopiscus refers to Constantinus Chlorus as emperor and Diocletian as a private citizen, dating this composition between Diocletian's abdication on 1 May 305 and Constantius' death on 25 July 306{{sfn|Birley|1988|p=10}} refers to any of the other authors (specifically Trebellius Pollio, Julius Capitolinus and Aelius Lampridius). None of the other five demonstrate any awareness of the existence of any of their 'colleagues'.{{sfn|Birley|1988|p=10}} However, these references cause difficulties when these authors also address Constantine in their dedications, as Vopiscus was also doing. For instance, Capitolinus mostly addresses Diocletian, but in the Albinus, Maximini and Gordiani he addresses Constantine in a fashion that suggests he is writing after 306.{{sfn|Birley|1988|p=11}}The theory that there was a single author, as initially postulated by Hermann Dessau, is based on the difficulties inherent in having a single work comprising a number of individuals but without any textual evidence of an editor who brought the material together. This is especially evident in that the text has examples of stated intentions by an author to write a life of one of the emperors, only for that life to be completed by another of the scriptores.For example, Spartianus declares that he is going to write a life of Verus, but that life is attributed to Capitolinus.{{sfn|Rohrbacher|2016|p=5}} If those statements are true, and those additional lives were completed, then an editor must have been involved in the project in order to select one scriptor's life over another's.{{sfn|Rohrbacher|2016|p=5}}However, the presence of a post-Constantinian editor, as originally postulated by Theodore Mommsen, still has notable support, most recently articulated by Daniel Den Hengst, who suggests that the editor was the author of the second half of the History, operating under the pseudonyms of Pollio and Vopiscus. Further, that this editor not only wrote the secondary lives in the first half, but he was also responsible for the insertions into the primary lives in that series.{{sfn|Den Hengst|2010|p=182}} He takes the view that the vast stylistic differences between the two halves of the History means they cannot have been written by the same author.{{sfn|Den Hengst|2010|p=182}}Nevertheless, if the validity of six independent authors is accepted, there are still issues, as the way they approached their work does show similar themes and details.{{sfn|Rohrbacher|2016|p=5}} All six not only provide biographies for the emperors, but also for the Caesars and usurpers. They describe their work and approach in very similar language, and quote otherwise unknown historians and biographers, such as Junius Cordus. They collectively share many errors, such as calling Diadumenianus "Diadumenus".{{sfn|Rohrbacher|2016|p=5}} They also share much idiosyncratic content and similar language, with particular focus on women, wine and military discipline, and were fixated on poor plays on words ascribing personality traits to certain emperors, for instance Verus was truthful, while Severus was a severe individual.{{sfn|Rohrbacher|2016|p=5}} Additionally, the authors shared certain stylistic characteristics that has been suggested would not naturally occur between individuals writing separately. For instance, the authors all happen to use the word occido with respect to killing (a total of 42 occurrences), but only once do any of them use the alternative word of interficio. This ratio is not found with any other writers in this time period and for this genre.{{sfn|Rohrbacher|2016|p=5}} Finally, each of the six scriptores authored fictional lives for some of their biographies, all of them using fake sources, documents and acclamations.{{sfn|Rohrbacher|2016|p=6}}It has been postulated that the names of the scriptores themselves are also a form of literary playfulness, not only mocking both legitimate authors and historians, but also the narrative itself.{{sfn|Rohrbacher|2016|pp=20â21}} The names Trebellius Pollio and Flavius Vopiscus are sourced in various ways from Cicero's writings,{{sfn|Birley|2006|pp=25â27}} as is the name Capitolinus.{{sfn|Rohrbacher|2016|p=23}} Further, the word vopiscus is a rare Latin term, referring to a twin who survives, while its sibling died in utero; this has been interpreted to refer to "Flavius Vopiscus" as being the final one to survive from the six authors of the History.{{sfn|Rohrbacher|2016|p=23}} Vulcacius is believed to be a mockery of Volcatius Sedigitus, who was a historical literary critic with some association with humor. The meanings behind the other two scriptores (Spartianus and Lampridius) have eluded interpretation.{{sfn|Rohrbacher|2016|pp=23â24}}Finally, it should also be noted that the results of recent computer-assisted stylistic analysis concerning the single vs multiple authorship have proven to be inconclusive:"Computer-aided stylistic analysis of the work has, however, returned ambiguous results; some elements of style are quite uniform throughout the work, while others vary in a way that suggests multiple authorship. To what extent this is due to the fact that portions of the work are obviously compiled from multiple sources is unclear. Several computer analyses of the text have been done to determine whether there were multiple authors. Many of them conclude that there was but a single author, but disagree on methodology. However, several studies done by the same team concluded there were several authors, though they were not sure how many."{{sfn|Prickman|2013|loc=University of Iowa's website}}

Primary and secondary Vitae

A unique feature of the Augustan History is that it purports to supply the biographies not only of reigning Emperors (called "primary lives" by modern scholars), but also "secondary lives" of their designated heirs, junior colleagues, and usurpers who unsuccessfully claimed the supreme power.{{sfn|Syme|1971|pp=54â57}} Thus among the biographies of 2nd-century and early 3rd-century figures are included Hadrian's heir Aelius Caesar, and the usurpers Avidius Cassius, Pescennius Niger and Clodius Albinus, Caracalla's brother Geta and Macrinus' son Diadumenianus. None of these pieces contain much in the way of solid information: all are marked by rhetorical padding and obvious fiction. The biography of Marcus Aurelius' colleague Lucius Verus, which Mommsen thought 'secondary', is however rich in apparently reliable information and has been vindicated by Syme as belonging to the 'primary' series.{{sfn|Syme|1971|pp=56â57}}The 'secondary' lives allowed the author to exercise freedom in the invention of events, places and people without the need to conform to authentic historical facts.{{sfn|Birley|1988|pp=13â14}} As the work proceeds the author's inventiveness undergoes an increasing degree of elaboration as legitimate historical sources begin to run out, eventually composing largely fictional accounts such as the "biographies" of the "Thirty Tyrants", whom the author claimed had risen as usurpers under Gallienus. Moreover, after the biography of Caracalla the 'primary' biographies, of the emperors themselves, begin to assume the rhetorical and fictive qualities previously confined to the 'secondary' ones, probably because the secondary lives were written after the Life of Caracalla.{{sfn|Syme|1983|pp=44, 211, 214}}The biography of Macrinus is notoriously unreliable,{{sfn|Syme|1971|pp=57â59}} and after a partial reversion to reliability in the Life of Elagabalus, the Alexander Severus, one of the longest biographies in the entire work, develops into a kind of exemplary and rhetorical fable on the theme of the wise philosopher king.{{sfn|Syme|1971|pp=146â150}} Clearly the author's previous sources had given out, but also his inventive talents were developing. He still makes use of some recognized sources â Herodian up to 238, and probably Dexippus in the later books, for the entire imperial period the Enmannsche Kaisergeschichte as well as Aurelius Victor, Eutropius, Ammianus Marcellinus and Jerome â but the biographies are increasingly tracts of invention in which occasional nuggets of fact are embedded.{{sfn|Birley|1988|p=14}}{{sfn|Rohrbacher|2016|p=20}}However, even where recognisable facts are present, their use in the History cannot be taken at face value. In the Life of Alexander Severus, the History makes the claim at 24.4 that Alexander had considered banning male prostitution but had decided against making it illegal, although the author added that the emperor Philip did later ban the practice.{{sfn|Rohrbacher|2013|p=151}} Although the claim about Alexander is false, the note about Philip is true â the source of this is Aurelius Victor (28.6â7, and who in turn sourced it from the Kaisergeschichte), and the History even copies Victor's style of moralising asides, which were not in the Kaisergeschichte.{{sfn|Rohrbacher|2013|pp=150â151}} Normally, this anecdote would have been included in a Life of Philip, but its absence saw the author include it in another life. This is taken as evidence that the mid-work lacuna is deliberate, as the author was apparently reluctant to abandon any useful material that could be gleaned from the Kaisergeschichte.{{sfn|Rohrbacher|2013|p=151}}{| class=wikitable

Historical value

From the sixth century to the end of the 19th century, historians had recognized that the Historia Augusta was a flawed and not a particularly reliable source, and since the 20th century modern scholars have tended to treat it with extreme caution.{{sfn|Browning|1983|pp=43,45}}{{sfn|Rohrbacher|2016|p=4}} Older historians, such as Edward Gibbon, not fully aware of its problems with respect to the fictitious elements contained within it, generally treated the information preserved within it as authentic. For instance, in Gibbon's account of the reign of Gallienus, he uncritically reproduces the Historia Augusta's biased and largely fictional account of that reign.{{sfn|Bray|1997|pp=3â4}} So when Gibbon states "The repeated intelligence of invasions, defeats, and rebellions, he received with a careless smile; and singling out, with affected contempt, some particular production of the lost province, he carelessly asked, whether Rome must be ruined, unless it was supplied with linen from Egypt, and arras cloth from Gaul",{{sfn|Gibbon|1776|loc=Ch. 10}} he is reworking the passage in The Two Gallieni:I am ashamed to relate what Gallienus used often to say at this time, when such things were happening, as though jesting amid the ills of mankind. For when he was told of the revolt of Egypt, he is said to have exclaimed "What! We cannot do without Egyptian linen!" and when informed that Asia had been devastated both by the violence of nature and by the inroads of the Scythians, he said, "What! We cannot do without saltpetre!" and when Gaul was lost, he is reported to have laughed and remarked, "Can the commonwealth be safe without Atrebatic cloaks?" Thus, in short, with regard to all parts of the world, as he lost them, he would jest, as though seeming to have suffered the loss of some article of trifling service.{{sfn|Historia Augusta|loc=The Two Gallieni, 6.1â6.8}}Gibbon then noted after this passage: "This singular character has, I believe, been fairly transmitted to us. The reign of his immediate successor was short and busy; and the historians who wrote before the elevation of the family of Constantine could not have the most remote interest to misrepresent the character of Gallienus."{{sfn|Gibbon|1776|loc=Ch. 10, Note 156}} Modern scholars now believe that Gallienus' reputation was posthumously maligned, that he was one of the main architects of the later Roman imperial structure, and that his reforms were built upon by succeeding emperors.{{sfn|Bray|1997|p=4}}Nevertheless, it is unwise to dismiss it altogether as it is also the principal Latin source regarding a century of Roman history. For example, scholars had assumed that Veturius Macrinus mentioned in the Life of Didius Julianus was an invention of the author, like so many other names. However, an inscription was uncovered which confirmed his existence and his post as Praetorian Prefect in 193.{{sfn|Mellor|2002|p=163}} Likewise, the information that Hadrian's Wall was constructed during Hadrian's reign{{sfn|Historia Augusta|loc=Hadrian, 11.2}} and that the Antonine Wall was built during the reign of Antoninus Pius{{sfn|Historia Augusta|loc=Antoninus Pius, 5.4}} are recorded by no other extant ancient writer apart from the Historia Augusta,Where other ancient writers (such as Eutropius) speak of a defensive wall in Britain, they have associated it with the activities of Septimius Severus â see David Shorter's Roman Britain: A Sourcebook (2008), pp. 113â114. the veracity of which has been confirmed by inscriptions.{{sfn|Birley|1988|p=13}}

False documents and authorities

A peculiarity of the work is its inclusion of a large number of purportedly authentic documents such as extracts from Senate proceedings and letters written by imperial personages.{{sfn|Potter|2005|p=150}}{{sfn|Campbell|1994|p=248}} In all it contains around 150 alleged documents, including 68 letters, 60 speeches and proposals to the people or the senate, and 20 senatorial decrees and acclamations.{{sfn|Magie|1921|pp=xxâxxi}} Records like these are quite distinct from the rhetorical speeches often inserted by ancient historians â it was accepted practice for the writer to invent these himself{{sfn|Mehl|2011|p=21}} â and on the few occasions when historians (such as Sallust in his work on Catiline or Suetonius in his Twelve Caesars) include such documents, they have generally been regarded as genuine;{{sfn|Potter|2005|p=149}} but almost all those found in the Historia Augusta have been rejected as fabrications, partly on stylistic grounds, partly because they refer to military titles or points of administrative organisation which are otherwise unrecorded until long after the purported date, or for other suspicious content.{{sfn|Hadas|2013|pp=356â357}}{{sfn|Rohrbacher|2016|pp=6â8}}{{sfn|Syme|1983|pp=113â114}}The History moreover cites dozens of otherwise unrecorded historians, biographers, letter-writers, knowledgeable friends of the writers, and so on, most of whom must be regarded as expressions of the author's creative imagination.{{sfn|Syme|1983|pp=98â99}} For example, the biographer "Cordus" is cited twenty-seven times in the History. Long considered to be a real, but lost, biographer until midway into the 20th century,{{sfn|Magie|1921|pp=xviiiâxix}}{{sfn|Syme|1968|pp=96â98}} with a couple of minor exceptions where material claimed to be sourced from Cordus is in reality from Suetonius or Cicero, every other citation is fake, providing details which have been invented and ascribed to Cordus. Cordus is mentioned almost exclusively in those Vitae where the History used Herodian as the primary source, and his appearances vanish once Herodian's history comes to an end.{{sfn|Rohrbacher|2013|p=161}}The author would also misattribute material taken from a legitimate historian and ascribe it to a fictitious author. For instance, Herodian is used more often than he is explicitly referenced in the History; in addition to the ten times he is correctly cited, three times his material is cited as "Arrianus", probably to multiply the author's sources.{{sfn|Birley|2006|p=20}} Further, not only does the author copy from Herodian without citation (either direct lifts, abbreviations or supplementations), he often distorts Herodian, to suit his literary objective.{{sfn|Birley|2006|p=20}}{{sfn|Rohrbacher|2016|p=13}}Then there is the deliberate citation of false information which is then ascribed legitimate authors. For instance, at a minimum, five of the History's sixteen citations of Dexippus are considered to be fake, and Dexippus appears to be mentioned, not as a principal source of information, but rather as a contradictory author to be contrasted against information sourced from Herodian or the Enmannsche Kaisergeschichte. In addition Quintus Gargilius Martialis, who produced works on horticulture and medicine, is cited twice as a biographer, which is considered to be another false attribution.{{sfn|Rohrbacher|2013|p=160}}

Examples of false historical events and personages

The untrustworthiness of the History stems from the multifarious kinds of fraudulent (as opposed to simply inaccurate) information that run through the work, becoming ever more dominant as it proceeds.{{sfn|Birley|1988|pp=13â14}} The various biographies are ascribed to different invented 'authors', and continue with the dedicatory epistles to Diocletian and Constantine, the quotation of fabricated documents, the citation of non-historical authorities, the invention of persons (extending even to the subjects of some of the minor biographies), presentation of contradictory information to confuse an issue while making a show of objectivity, deliberately false statements, and the inclusion of material which can be shown to relate to events or personages of the late 4th century rather than the period supposedly being written about.{{sfn|Birley|1988|pp=12â16}} For example:

The biography of Geta states he was born at Mediolanum on 27 May; the year is not specified but it was 'in the suffect consulships of Severus and Vitellius'.{{sfn|Historia Augusta|loc=Geta, 3.1}} He was actually born at Rome on 7 March 189; there was no such pair of suffect consuls in this or any other year;{{sfn|Syme|1968|p=123}} however, it has been suggested that the names for these persons be amended to be Severus and Vettulenus, and that these men were suffect consuls sometime before 192.{{sfn|Birley|1966|pp=249â253}}

A letter of Hadrian written from Egypt to his brother-in-law Servianus is quoted at length (and was accepted as genuine by many authorities well into the 20th century).{{sfn|Raschke|1976|pp=761â762}} Servianus is saluted as consul, and Hadrian mentions his (adopted) son Lucius Aelius Caesar: but Hadrian was in Egypt in 130, Servianus' consulship fell in 134, and Hadrian adopted Aelius in 136.{{sfn|Habelt|1968|p=121}}{{sfn|Birley|2013|p=3}} The letter is said to have been published by Hadrian's freedman Phlegon, with the letter's existence not mentioned anywhere except in the History, in another suspect passage.{{sfn|Syme|1968|p=60}} A passage in the letter dealing with the frivolousness of Egyptian religious beliefs refers to the Patriarch, head of the Jewish community in the Empire. This office only came into being after Hadrian put down the Jewish revolt of 132, and the passage is probably meant in mockery of the powerful late 4th-century Patriarch, Gamaliel.{{sfn|Syme|1971|pp=21â24}}

Decius revives the office of Censor; the Senate acclaims Valerian as worthy to hold it in a decree dated 27 October 251. The decree is brought to Decius (on campaign against the Goths) and he summons Valerian to bestow the honour.{{sfn|Historia Augusta|loc=The Two Valerians, 5.4â6.1}} The revival of the censorship is fictitious, and Decius had been dead for several months by the date stated.{{sfn|Syme|1971|p=215}}

Valerian holds an imperial council in Byzantium, attended by several named dignitaries, none of them otherwise attested and some holding offices not known to exist until the following century, at which the general 'Ulpius Crinitus' (a name apparently chosen to evoke the military glories of the Emperor Trajan) takes the young Aurelian (destined to be another military Emperor) as his adopted son. There are no grounds to believe this is anything other than invention.{{sfn|Den Hengst|2010|p=97}}

In the Tyranni Triginta, the author 'Trebellius Pollio' sets out to chronicle 'the 30 usurpers who arose in the years when the Empire was ruled by Gallienus and Valerian'.{{sfn|Historia Augusta|loc=The Lives of the Thirty Pretenders, 1.1}} The number 30 is evidently modelled on the notorious 'Thirty Tyrants' who ruled Athens after the end of the Peloponnesian War.{{sfn|Bunson|1991|p=414}} The chapter contains 32 mini-biographies. They include two women, six youths, and seven men who never claimed the imperial power; one usurper of the reign of Maximinus Thrax, one of the time of Decius, and two of the time of Aurelian; and a number who are not historical personages: Postumus the Younger, Saturninus, Trebellianus, Celsus, Titus, Censorinus, and Victorinus Junior.{{sfn|Cancik|Schneider|Salazar|2009|p=91}}

In the Life of Tacitus, the emperor is acclaimed by the Senate, meeting in the Curia Pompiliana, which never existed.{{sfn|Den Hengst|2010|p=159}} The History then lists a number of individuals, all of whom are invented by the author: the consul 'Velius Cornificius Gordianus',{{sfn|Kreucher|2003|p=105}} 'Maecius Faltonius Nicomachus',{{sfn|Syme|1971|pp=4, 12}} the Prefect of the City 'Aelius Cesettianus',{{sfn|Syme|1983|p=117}} and the Praetorian Prefect 'Moesius Gallicanus'.{{sfn|Baldwin|1984|p=4}} Private letters commending Tacitus are quoted from the senators 'Autronius Tiberianus' and 'Claudius Sapilianus', both of whom are assumed to be non-historical personages.{{sfn|Syme|1971|pp=238â239}} Most of the 'Maecii' and 'Gallicani' in the History are believed to be inventions of the author.{{sfn|Syme|1971|pp=4, 12}}{{sfn|Baldwin|1984|p=4}}

In the Quadrigae Tyrannorum (Four tyrants: The Lives of Firmus, Saturninus, Proculus and BonosusThe Lives of Firmus, Saturninus, Proculus and Bonosus at LacusCurtius), the author includes Firmus, said to have been a usurper in Egypt under Aurelian.{{sfn|Historia Augusta|loc=The Lives of the Thirty Pretenders, 3.1}}{{sfn|Historia Augusta|loc=Aurelian, 32.2}} There is no certainty that this person ever existed; however, there was a Corrector named Claudius Firmus stationed in Egypt in 274, about the time Zosimus states that Aurelian was dealing with some trouble in that province.{{sfn|Barnes|1978|p=71}} Nevertheless, the History's wealth of detail about him is considered to be completely invented.{{sfn|Den Boeft|Drijvers|Den Hengst|Teitler|2013|pp=150}} For example, he would eat an ostrich a day, he had a carriage drawn by ostriches, he would swim among crocodiles, he built himself a house fitted with square panels of glass.{{sfn|Historia Augusta|loc=The Lives of the Thirty Pretenders, 3.2â6.5}}

In the Life of Probus,{{sfn|Historia Augusta|loc=Probus, 24.1â24.3}} the author 'Flavius Vopiscus of Syracuse' states that the Emperor's descendants (posteri) fled from Rome and settled near Verona. There a statue of Probus was struck by lightning, a portent according to soothsayers 'that future generations of the family would rise to such distinction in the senate they all would hold the highest posts', though Vopiscus (supposedly writing under Constantine) says this prophecy has not yet come to pass. This is one of the strongest indications of the History's late 4th-century date, as it seems to be a fairly transparent allusion to the rich and powerful senator Sextus Claudius Petronius Probus (consul in 371) whose two sons held the consulship together in 395.{{sfn|Syme|1968|p=164}}{{sfn|Platnauer|Claudian|1922|loc=Panegyric on the Consuls Probinus and Olybrius, Note 1}} Petronius Probus was born in Verona.{{sfn|Jones|Martindale|Morris|1971|pp=739}}

Literary value

The Historia Augusta has been described by Ronald Syme as "the most enigmatic work that Antiquity has transmitted".{{sfn|Rohrbacher|2016|p=4}} Although much of the focus of study throughout the centuries has been on the historical content, since the 20th century there has also been an assessment of the literary value of the work. For much of that time the assessment has been critical, as demonstrated by the analysis put forward by David Magie:The literary, as well as the historical, value of the Historia Augusta has suffered greatly as a result of the method of its composition. In the arrangement in categories of the historical material, the authors did but follow the accepted principles of the art of biography as practised in antiquity, but their narratives, consisting often of mere excerpts arranged without regard to connexion or transition, lack grace and even cohesion. The over-emphasis of personal details and the introduction of anecdotal material destroy the proportion of many sections, and the insertion of forged documents interrupts the course of the narrative, without adding anything of historical value or even of general interest. Finally, the later addition of lengthy passages and brief notes, frequently in paragraphs with the general content of which they have no connexion, has put the crowning touch to the awkwardness and incoherence of the whole, with the result that the oft-repeated charge seems almost justified, that these biographies are little more than literary monstrosities.{{sfn|Magie|1921|pp=xxiiiâxxiv}}M. L. W. Laistner was of the opinion that "even if the Historia Augusta was propaganda disguised as biography, it is still a wretched piece of literature",{{sfn|Laistner|1966|p=180}} while Ronald Syme noted that with respect to the author's Latin prose:He was not an elegant exponent. His normal language is flat and monotonous. But uneven, and significantly so. For this author is erudite, a fancier of words, and a collector. Hence many rarities, or even inventions ... first, when depicting the measures of a military disciplinarian, he brings in technical terms redolent of the camp. Second, archaism, preciosity, and flowery words.{{sfn|Syme|1971|p=251}}Further, the work shows evidence of its having been put together in a very haphazard and hasty fashion, with little to no subsequent editing of the material to form a cohesive narrative.{{sfn|Birley|1988|pp=18â19}} Birley sees an example of the carelessness with which the author approached the work in the construction of Marcus Aurelius' biography, where midway through the Life of Marcus Aurelius the author found himself in a muddle, probably because he had historical material in excess of what he required, and also because he had already used up much of his source to write separate biographies of Lucius Verus and Avidius Cassius, whose lives intersected with Marcus'.{{sfn|Birley|1988|p=19}} The answer he came up with was to use Eutropius as his source for a brief overview of Marcus' principate following the death of Lucius Verus.{{sfn|Birley|1988|p=19}} However, he found that in doing so, the narrative's ending was too abrupt and so, after including some gossip about Commodus not being his son, he once again began an account of Marcus' reign after the death of Verus.{{sfn|Birley|1988|p=19}}Although these criticisms still form the prevailing view on the History's literary worth, modern scholars such as Rohrbacher have begun to argue that, while it is poorly written and not a stylistic or polished work,{{sfn|Rohrbacher|2016|p=171}}{{sfn|Birley|1988|p=18}} its use of allusion as a vehicle for parodying popular late 4th century biographical and historiographical works means that the very features which were once a cause for intense criticism (such as the inclusion of irrelevant or contradictory inventions alongside traditionally sourced material) are actually an intentional and integral part of the work, making it one of the most unique pieces of literature to emerge from the ancient world.{{sfn|Rohrbacher|2016|pp=170â172}}{{sfn|Rohrbacher|2013|p=148}}